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The Effect of Surfactants on the Water Solubility of Herbicides, and the Foliar Phytotoxicity of Surfactants

Published online by Cambridge University Press:  12 June 2017

Ralph E. Temple  and
H. Wayne Hilton
Ralph E. Temple
Affiliation:
Experiment Station, Hawaiian Sugar Planters' Association, Honolulu, Hawaii
H. Wayne Hilton
Affiliation:
Experiment Station, Hawaiian Sugar Planters' Association, Honolulu, Hawaii
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Abstract

The apparent solubility in water of 2-ethylamino-4-isopropylamino-6-methylmercapto-s-triazine [ametryne], 3-(3,4-dichlorophenyl)-1,1-dimethyl urea [diuron], and 2-chloro-4-ethylamino-6-isopropylamino-s-triazine [atrazine] was increased when a surfactant was added to the water. At 0.5% surfactant concentrations, considerable variation in solubility was found, both as regards the herbicide and surfactant used, as measured by ultraviolet absorption spectrophotometry. The two triazines were more soluble in cationic surfactants, followed by anionic and nonionic; diuron was more soluble in cationic followed by nonionic and anionic types.

Minimum lethal levels of surfactant in water for 2 week old cucumber plants varied from about 0.1% for the cationic to 0.2% for most nonionic and 1.0% or more for anionics of the alkyl aryl sulfonate type.

Type
Research Article
Information
Weeds , Volume 11 , Issue 4 , October 1963 , pp. 297 - 300
Copyright
Copyright © 1963 Weed Science Society of America 

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References

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